public void SetScaleI()
{
// rounding mode defaults to zero
BigDecimal setScale1 = new BigDecimal(value, 3);
BigDecimal setScale2 = BigMath.Scale(setScale1, 5);
BigInteger setresult = BigInteger.Parse("1234590800");
Assert.True(setScale2.UnscaledValue.Equals(setresult) && setScale2.Scale == 5,
"the number 12345.908 after setting scale is wrong");
Assert.Throws <ArithmeticException>(() => BigMath.Scale(setScale1, 2, RoundingMode.Unnecessary));
}
public void SetScaleII()
{
BigDecimal setScale1 = new BigDecimal(2.323E102);
BigDecimal setScale2 = BigMath.Scale(setScale1, 4);
Assert.True(setScale2.Scale == 4, "the number 2.323E102 after setting scale is wrong");
Assert.True(setScale2.ToDouble() == 2.323E102, "the representation of the number 2.323E102 is wrong");
setScale1 = BigDecimal.Parse("-1.253E-12");
setScale2 = BigMath.Scale(setScale1, 17, RoundingMode.Ceiling);
Assert.True(setScale2.Scale == 17, "the number -1.253E-12 after setting scale is wrong");
Assert.True(setScale2.ToString().Equals("-1.25300E-12"),
"the representation of the number -1.253E-12 after setting scale is wrong, " + setScale2);
// testing rounding Mode ROUND_CEILING
setScale1 = new BigDecimal(value, 4);
setScale2 = BigMath.Scale(setScale1, 1, RoundingMode.Ceiling);
Assert.True(setScale2.ToString().Equals("1234.6") && setScale2.Scale == 1,
"the number 1234.5908 after setting scale to 1/ROUND_CEILING is wrong");
BigDecimal setNeg = new BigDecimal(-value, 4);
setScale2 = BigMath.Scale(setNeg, 1, RoundingMode.Ceiling);
Assert.True(setScale2.ToString().Equals("-1234.5") && setScale2.Scale == 1,
"the number -1234.5908 after setting scale to 1/ROUND_CEILING is wrong");
// testing rounding Mode ROUND_DOWN
setScale2 = BigMath.Scale(setNeg, 1, RoundingMode.Down);
Assert.True(setScale2.ToString().Equals("-1234.5") && setScale2.Scale == 1,
"the number -1234.5908 after setting scale to 1/ROUND_DOWN is wrong");
setScale1 = new BigDecimal(value, 4);
setScale2 = BigMath.Scale(setScale1, 1, RoundingMode.Down);
Assert.True(setScale2.ToString().Equals("1234.5") && setScale2.Scale == 1,
"the number 1234.5908 after setting scale to 1/ROUND_DOWN is wrong");
// testing rounding Mode ROUND_FLOOR
setScale2 = BigMath.Scale(setScale1, 1, RoundingMode.Floor);
Assert.True(setScale2.ToString().Equals("1234.5") && setScale2.Scale == 1,
"the number 1234.5908 after setting scale to 1/ROUND_FLOOR is wrong");
setScale2 = BigMath.Scale(setNeg, 1, RoundingMode.Floor);
Assert.True(setScale2.ToString().Equals("-1234.6") && setScale2.Scale == 1,
"the number -1234.5908 after setting scale to 1/ROUND_FLOOR is wrong");
// testing rounding Mode ROUND_HALF_DOWN
setScale2 = BigMath.Scale(setScale1, 3, RoundingMode.HalfDown);
Assert.True(setScale2.ToString().Equals("1234.591") && setScale2.Scale == 3,
"the number 1234.5908 after setting scale to 3/ROUND_HALF_DOWN is wrong");
setScale1 = new BigDecimal(BigInteger.Parse("12345000"), 5);
setScale2 = BigMath.Scale(setScale1, 1, RoundingMode.HalfDown);
Assert.True(setScale2.ToString().Equals("123.4") && setScale2.Scale == 1,
"the number 123.45908 after setting scale to 1/ROUND_HALF_DOWN is wrong");
setScale2 = BigMath.Scale(BigDecimal.Parse("-1234.5000"), 0, RoundingMode.HalfDown);
Assert.True(setScale2.ToString().Equals("-1234") && setScale2.Scale == 0,
"the number -1234.5908 after setting scale to 0/ROUND_HALF_DOWN is wrong");
// testing rounding Mode ROUND_HALF_EVEN
setScale1 = new BigDecimal(1.2345789D);
setScale2 = BigMath.Scale(setScale1, 4, RoundingMode.HalfEven);
Assert.True(setScale2.ToDouble() == 1.2346D && setScale2.Scale == 4,
"the number 1.2345789 after setting scale to 4/ROUND_HALF_EVEN is wrong");
setNeg = new BigDecimal(-1.2335789D);
setScale2 = BigMath.Scale(setNeg, 2, RoundingMode.HalfEven);
Assert.True(setScale2.ToDouble() == -1.23D && setScale2.Scale == 2,
"the number -1.2335789 after setting scale to 2/ROUND_HALF_EVEN is wrong");
setScale2 = BigMath.Scale(BigDecimal.Parse("1.2345000"), 3, RoundingMode.HalfEven);
Assert.True(setScale2.ToDouble() == 1.234D && setScale2.Scale == 3,
"the number 1.2345789 after setting scale to 3/ROUND_HALF_EVEN is wrong");
setScale2 = BigMath.Scale(BigDecimal.Parse("-1.2345000"), 3, RoundingMode.HalfEven);
Assert.True(setScale2.ToDouble() == -1.234D && setScale2.Scale == 3,
"the number -1.2335789 after setting scale to 3/ROUND_HALF_EVEN is wrong");
// testing rounding Mode ROUND_HALF_UP
setScale1 = BigDecimal.Parse("134567.34650");
setScale2 = BigMath.Scale(setScale1, 3, RoundingMode.HalfUp);
Assert.True(setScale2.ToString().Equals("134567.347") && setScale2.Scale == 3,
"the number 134567.34658 after setting scale to 3/ROUND_HALF_UP is wrong");
setNeg = BigDecimal.Parse("-1234.4567");
setScale2 = BigMath.Scale(setNeg, 0, RoundingMode.HalfUp);
Assert.True(setScale2.ToString().Equals("-1234") && setScale2.Scale == 0,
"the number -1234.4567 after setting scale to 0/ROUND_HALF_UP is wrong");
Assert.Throws <ArithmeticException>(() => BigMath.Scale(setScale1, 3, RoundingMode.Unnecessary));
// testing rounding Mode ROUND_UP
setScale1 = BigDecimal.Parse("100000.374");
setScale2 = BigMath.Scale(setScale1, 2, RoundingMode.Up);
Assert.True(setScale2.ToString().Equals("100000.38") && setScale2.Scale == 2,
"the number 100000.374 after setting scale to 2/ROUND_UP is wrong");
setNeg = new BigDecimal(-134.34589D);
setScale2 = BigMath.Scale(setNeg, 2, RoundingMode.Up);
Assert.True(setScale2.ToDouble() == -134.35D && setScale2.Scale == 2,
"the number -134.34589 after setting scale to 2/ROUND_UP is wrong");
Assert.Throws <ArgumentException>(() => BigMath.Scale(setScale1, 0, (RoundingMode)123));
}